Summary
Cultured adult cardiocytes were exposed to anoxia. The initial decrease of high-energy phosphates was accompanied by a moderate release of cytosolic enzymes and morphological changes: the appearance of sarcolemmal ‘microblebs’ (~1 µm in diameter) and an increase of subsarcolemmal vesicles. At ATP levels above 2 µmol/gww, metabolic and morphological alterations were reversible. Probably the sarcolemmal changes are causally related to the loss of macromolecules from reversibly injured cells. At ATP levels below 2 µmol/gww, an increasing number of cells become irreversibly hypercontracted. In these cells cytoplasmic masses are protruded into large `macroblebs’ (10–30 µm in diameter), however sarcolemmal continuity is preserved. Thus, enzyme release, irreversible contracture and cytolysis do not occur simultaneously in anoxic isolated cardiocytes.
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© 1984 Springer-Verlag Berlin Heidelberg
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Piper, H.M., Schwartz, P., Spahr, R., Hütter, J.F., Spieckermann, P.G. (1984). Anoxic injury of adult cardiac myocytes. In: Piper, H.M., Spieckermann, P.G. (eds) Adult heart muscle cells. Steinkopff, Heidelberg. https://doi.org/10.1007/978-3-662-11041-6_6
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DOI: https://doi.org/10.1007/978-3-662-11041-6_6
Publisher Name: Steinkopff, Heidelberg
Print ISBN: 978-3-662-11043-0
Online ISBN: 978-3-662-11041-6
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